Container sealing machine



June 1,1937. E. BLACK El AL 2,081,908

' CONTAINER SEALING MACHINE Filed Jan. 5, 1934 5 Sheets-Sheet 1 June l, l937. I. E. BLACK El AL 2,081,903

' CONTAINER SEALING MACHINE Filed Jan. 5, 1934 5 Sheets-Sheet 2 June 1, 1937. I. E. B-LACK ET AL I 2,081,908

CONTAINER SEALING MACHINE June 1, 1937.

lv III Filed Jan. 5, 1934 5 Shee ts -Sheet 4 liq/17491 7. Blue/i: lfliu yfl. Silver June 1, 1937. I l. E. BLACK Er AL 2,081,908

CONTAINER SEALING MACH INE Filed Jar 1. 5, 1934 5 Sheets-Sheet 5 Patented June 1, 1937 UNITED STATES CONTAINER SEALING MACHINE Irving E. Black, Frederick J. Hoffer, and Henry B. Silver, Brooklyn, N. Y., assignors to Plastic Seal Corporation, Brooklyn, N. Y., a corporation of New York Application January 5,

25 Claims.

The present invention relates to the sealing of bottles and like containers by the application vof a viscous sealing fluid about the outside of a portion of the container and its closure over the joint between them.

It is well-known practice in the bottling art to apply a cap of such a viscous fluid to a closed container, such cap completely covering the closure and extending to a point below the edge of the closure and about a portion of the neck of the container. The sealing fluid used has the property of shrinking upon drying, and as it is impervious to air and moisture it forms an extremely effective seal which is widely used to protect substances that are volatile or are subject to deterioration by the influence of air or moisture. The usual method of forming such seals is to invert the closed container and dip a certain part of the neck into a tank of the fluid, thus forming a cap of the material covering the closure and extending down about the neck of the container.

The object of the present invention is to provide a machine for applying a ribbon of sealing material about the joint between the closure and the neck of a container, and particularly a container closed by the well-known cap having a depending skirt which surrounds the neck of the container.

Another object is to provide such a machine that is completely automatic in its operation-and that is highly eflicient.

Still another object is the provision of a machine which cannot be stopped during the time that a container is being sealed, thereby preventing loss through the partial sealing of containers consequent to such stoppage by the attendant.

In the accompanying drawings:

Figure 1 is an elevation of the machine taken from the rear side thereof.

Figure 2 is a similar view from the front showing a portion of the sealing fluid reservoir in section.

Figure 3 is a side elevation partly in section of the motor and driving connections and the container support and conveyor.

Figure 4 is a top plan View of the mechanism shown in Figure 3, taken as indicated on the line 4-4 of Figure 3.

Figure 5.is a top plan view of the sealing device proper showing the driving means therefor.

Figure 6 is a sectional view taken on the line 6-6 of Figure 5.

1934, Serial No. 705,434

Figure '7 is a sectional view taken on the line 1'| of Figure 4.

Figure 8 is an enlarged sectional view of the measuring pump, the sealing nozzle and the mechanism for clamping containers in position for sealing.

Figure 9 is a sectional view on the line 9-9 of Figure 4.

Figure 10 is a bottom plan view of the cam track which operates the container clamping means.

Figure 11 is a bottom plan view of the sealing mechanism and showing a portion of the clamping means.

Figure 12 is a sectional view of the measuring pump for the sealing fluid.

Figure 13 is a view of the device which prevents stopping of the machine during the operation of sealing a container.

Figure 14 is a sectional view taken on the line l4-l4 of Figure 3.

Describing the drawings more particularly, there is an upstanding base I6, having a suitable foot portion I1. At the top of the base I6 is mounted a table-like support I8. Above and spaced from the support l8 are two horizontal plates, designated l9 and 20, separated by a slot 2| and supported by ribs 22 upstanding from the support l8. Extending laterally from the top of the base l6 and underneath the support l8 are flanges 23 terminating in thickened portions 24 for a purpose to be later described. The support I8 is provided with three bearings 25 in which are journaled stud shafts 26 that project above the support IS. A fourth bearing in the support l8 receives a shaft 26a which extends to a point above the support. The portion of the shaft 26a extending above the support l8, serves as a means for adjusting the container feeding device. Upon the shafts 26, 26a, are mounted sprocket wheels 21, the outer edges of which extend beyond the margins of the plate 20.

A sprocket chain 28 is mounted upon the wheels 21 to travel between the support [8 and the plate ZO'and outside of the edges of the latter. The chain is driven through the shaft 26a. Fingers 29 are mounted at spaced points upon the sprocket chain 28 and extend upwardly above the top surface of the plate 20. The wheels 21 are so mounted that the chain 28 passes beneath the slot 2|, between the plates [9 and 20, and the fingers project up through the slot and travel between the plates, projecting above them.

In the thickened portions 24 are mounted supporting rods 30 extending upwardly to a substantial height above the support and secured in the enlar ed portion by set screws. Slidably mounted on the rods 39 is asupport 3i having a horizontal wall 32 and side walls 33 about its edges. From the side walls 33, lugs 33 extend laterally. These lugs 34 are apertured to engage the rods 39, as shown at 35 in Figure and are split so that they may be clamped upon the rods 33 in a well-known manner, to secure the support Si in vertical position. Threaded rods 36 are revolubly supported by the support 58 and are adapted when revolved, to raise or lower the support 3 I. In order to secure uniform action by these rods they are connected by a sprocket chain 3? (Figs. 5 and 6) to revolve together.

Above the support 3i and supported by the rods 39 is a reservoir 38 for sealing fluid. This reservoir comprises a tank having a cover 39 adapted to be swung open upon a hinge fill. Within the tank are lugs ll extending inwardly from the inside of the tank wall for the purpose of sup, porting an open container 42 in inverted position within the reservoir, as shown in Figure 2. It may here be stated that viscous sealing fluids, such as are intended to be used in this machine, are commonly sold in containers, such as that indicated at 42. These containers may be opened at the top and placed within the reservoir 33 in inverted position, and the fluid will drain into the lower part of the reservoir.

Upon the cover 39 of the reservoir is a T-shaped pipe connection 33 connecting the interior cham her with the atmosphere. Each end of the connection bears a pressure relief valve 4d, 45, for relieving any excess pressure which may develop within the reservoir 38, and for permitting air to enter the resevoir to prevent a vacuum being caused by the withdrawal of sealing fluid, respectively.

Below the reservoir 38 and connected therewith by a pipe connection 43 is a feed pump 4! supported upon a cross member 18 secured upon the supporting rods 39. This pump is intermittently driven during the operation of the machine by a motor, through mechanism later described.

Within the walls 33 of the support 3| is an upstanding bracket 49 integral with the bottom wall 32 of the support. Within this bracket is a rotary pump, which may be termed a measuring pump, designated generally by the numeral 59. This pump includes an outer rotary casing 5| (see Figures 6 and 8). The casing 5| has an annular outer extension 52, which engages an inward shoulder 53 formed by the bracket 49. Secured to and supported by the bracket 53 is a collar-like member 54 having an inward shoulder which engages the top of the extension 52 of the casing. The collar member 5a terminates in an upward circular wall 55 surrounding the upper portion of the casing 5|. An inward annular shoulder 5'6 is positioned below the top of the circular wall 55. This shoulder is adapted to support a packing 5?. Above the top of the casing 5| is a stationary cap 59 forming a fluid supply gland it. This supply gland 59 receives sealing fluid from the feed pump 4? by means of a flexible pipe E9, the pipe $9 being flexible to allow for vertical adjustment of the support member 3 I. From the gland 58 a flexible by-pass pipe 3! having a suitable check valve 32 leads back to the reservoir. The by-pass pipe BI is provided to allow the return of any excess fluid supplied to the measuring pump by the feed pump 47.

Within a chamber in the casing 5| of the uppermost position.

measuring pump 50 is a power-driven pump-ing rotor. This pumping rotor comprises an internally toothed gear wheel 63 meshing with an externally toothed idler 64 eccentric with the gear wheel 63 and a luna-shaped abutment 66 interposed between the gear wheel 63 and the idler ea at one side of the gear wheel. The gear wheel 64 rotates on an idler pin 65. From the gear wheel 63 upwardly through the casing 5| and through the cap 58 extends a drive shaft 67 for the gear wheel 63, carrying on its upper end a gear wheel '68 by which it is revolved.

Extending from the gland 59 downwardly through the casing 5|, is an intake passage 69 which communicates with the intake of the pumping rotor 63. From the opposite or discharge side of the rotor, a passage extends downwardly to the bottom of the casing.

Secured to the bottom wall of the casing and adapted to rotate therewith is a plate H through which is a passage i2 communicating with the outlet passage H3. Integrally formed with the plate 7! and extending to one side thereof is a nozzle bracket 13. This nozzle bracket contains a longitudinal passage 14 communicating with the passage 72. The bottom of the bracket 13 is provided with a channel 75 having dovetail walls it. A plurality of vertical ports '51, adapted to be closed by plugs 18, communicate between the upper wall of the slot and the passage 14. Upon the end of the bracket 13 and extending below its lowermost point, is a plate 79 secured in position by a screw 89 threaded into the end of the passage 14 and serving also as a plug therefor.

A nozzle 81 is longitudinally slidable in the slot 15 and is supported therein by extensions engaging the dovetail walls 75 thereof. The nozzle Bl has a passage 82 which may be caused to register with either or" the ports 11 in the bracket 13 by adjusting the nozzle along the slot 15. The ports 11, which are not in communication with this passage 82, are intended to be closed by the plugs 78. For adjusting the nozzle 8| and securing it in its adjusted position, a screw 83 is rotatably journaled in the plate 19. This screw is threaded through a wing 84 extending from the nozzle, as shown in Figure 11. The nozzle 8| has an offset end portion 85 which is threaded at 86. A nozzle tip 81 is intended to be mounted upon the offset portion 85 by means of a screw thimble 88. The nozzle tip 8'! may be replaced by similar tips having various sized or shaped apertures, depending upon the thickness, width, etc. of the ribbon of sealing fluid to be applied to a container to seal it.

Automatic clamping means are provided to hold the container in proper position for sealing. Upon the plate 'ii and adapted to rotate therewith is a projecting wing 89 extending in a direction opposite to that of the nozzle bracket 73. Mounted upon the central portion of this wing 89 and also engaging the lower central portion of the bracket 13 is a circular member 93 having a central aperture 9!. Mounted for vertical reciprocation in this aperture 9i is a cylinder 92 having a flange about its top against which a spring 94 bears to urge the cylinder 92 to its A pin 93, mounted in the cylinder 92, prevents rotation of the cylinder 92 while in motion, being slidable in a slot in the member 90. (See Figure 8.) The cylinder 92 has a central bore 92a in which a headed plunger 93a is slidingly mounted. A coil spring 94a between the head of the plunger and the cylinder urges them apart and serves to yieldingly transmit force for forcing the cylinder 92 downwardly. A cup 95 is detachably secured to the bottom portion of the cylinder 92 by means of a set screw 95: threaded through the wall of the cup 95 and en gaging in a channel 951) out into the cylinder 92. This structure permits relative rotation between the cup 95 and the cylinder 92, the: cup remaining stationary when engaged with a container cap, in order to avoid marring the same, while the cylinder 92 rotates with the remainder of the assembly. Other cups to suit different sizes or shapes of caps may be substituted therefor. Upon the outer portion of the wing 89 is pivoted a bell crank 96. One arm 91 of this crank terminates in a bearing member 98 adapted to engage the top of the headed plunger 93a and press it downwardly when the crank is operated. The other arm 99 extends upwardly and carries a wheel I99. This wheel I99, as the plate TI and wing 89 rotate, runs over a stationary cam track I9I (see Figures 8 and 10), secured to and supported by the bottom wall 32 of the support 3I. The cam track I9I has a single relatively small dwell I92 located therein.

The operation of this clamping mechanism is as follows. When the pump casing starts its revolution, the cam wheel rides up out of the dwell I92, causing the arm 91 to depress and operate through the plunger and spring to depress the cylinder 92 and consequently the. cap 95 upon the container and clamp it securely in position. During the continued rotation of the pump casing and plate 1|, sealing fluid is pumped through the nozzle and discharged about the joint between the cap and the: neck of the container, and during the complete rotation the container is held clamped as above described. When the rotation is completed and the ribbon of sealing fluid extends completely around the joint, the wheel I99 again reaches the dwell I92 and through the action of the spring 94, rides into it, thus allowing the raising of the cylinder 92 and cap 95 by the spring 94 and releasing the container.

Describing the mechanism for driving the apparatus, I93 designates an electric motor mounted upon the rear side of the base I9. The motor I93 drives, through a reduction gear assembly I94, a vertical drive. shaft I95, which extends upwardly in the rear of the base I6. The upper end of the shaft I95 bears one element I96 of a friction clutch, which is operated by a vertically swinging shipper lever I91 fulcrumed at I98 on a projection of the base (see Figures 3 and '7). The end of the shipper lever I91 extends through an opening in the base I6 and is connected by a link I99 to a foot pedal I I9, suitably pivoted to the base near the bottom thereof. The shipper lever I91 has a crank arm I I I which carries a wheel I I2 revolubly mounted on its end.

A driven shaft H3 is adapted to be: engaged with the element I96 by a clutch element H4. The upper end of the shaft II3 carries a braking element II5 which engages a portion of the base I6 when the shipper lever is moved to its upper position. Above the clutch element H4 and below the brake element II5, the shaft I I3 bears a rotary cam, designated H5, having a single small dwell therein. The wheel II2 bears against the cam I I6 as it revolves, and through the extension I I I, holds the shipper lever I91 in its downward position, thus keeping the clutch engaged until the dwell portion of the cam reaches the wheel whereupon the wheel enters the dwell due to the action of a spring I I1 which urges the outer end of the lever I91 upward or toward its disengaging position. The shaft II3 drives a shaft II8 concentric therewith, which extends vertically upwards.

At a point above the braking element H5 and below the support I8 is a mutilated gear II9 mounted upon and driven by the shaft H8, and which intermittently drives a gear wheel I29 keyed to a shaft I2I suitably journaled in the base I6 of the support I8. A sprocket wheel I22 is mounted upon the shaft I2I and rotates therewith to drive through a sprocket chain I23, and wheel I24, the shaft 26a journaled in the support I 8 and the sprocket wheel 21a. carried thereby. Through the mechanism just described, the sprocket chain 28 is given an intermittent movement around its course.

Mounted upon the main shaft II8 above the mutilated gear H9 is another mutilated gear designated I25, the teeth of which mesh with a gear wheel I26 and drive it intermittently. The wheel I29 is secured to and drives a shaft I21 through which the sealing device proper is operated. The shaft I21 extends vertically through the bottom wall 32 of the support 3|. The outer wall of the pump casing 5I bears a series I28 of sprocket teeth. Upon the shaft I21 and on a plane with the series of sprocket teeth I28 is mounted a sprocket wheel I29 which drives the casing 5I through a sprocket chain I39 engaging the sprocket teeth I28.

The shaft I21 extends upwardly above the wheel I29, and at a point on a plane with the gear wheel 68 which drives the rotor of the pump 59, is mounted a gear wheel I3I which drives through an intermediate gear I32, the gear wheel 68. The gear wheel I32 is mounted upon a swinging support I33 to allow the substitution of various sizes of gears 68 in order to vary the speed at which the rotor of the pump is driven, and consequently vary the amount of fluid supplied to the sealing nozzle by the sealing of containers of various sizes.

The shaft I21 extends above the side walls of the support 3I, and drives through a system of gearing designated generally I34, the feed pump '11 below the bottom of the reservoir 38.

In order to guide containers fed by the chain 28 to a position beneath the sealing device below the center of the plate 1|, two fences I35 are positioned upon the plates I9 and 29 parallel to the slot 2 I. The fences are eachadjustabletoward or away fromeach other by threaded studs I36, projecting rearwardly therefrom, respectively. The studs are moved by nuts I38 mounted in brackets secured to the support I8. The nuts I39, are respectively connected by sprocket chains I99 to insure the parallelism of the fences I35.

The operation of the mechanism described is as follows. When the pedal I I9 is depressed, the shipper lever operates to connect the shaft II3 to the shaft I95 by means of the friction clutch. Thereupon the cam II6 revolves and the dwell thereof moves away from the wheel II2 which rides upon the surface of the cam, and through the arm III locks the shipper lever in its engaged position. As the shaft H8 is moved, the sprocket chain 28 is intermittently moved by reason of the multilated gear H9 and the drive above described. The teeth of the mutilated gears H9 and I25 are so arranged that when the chain 28 is in motion the shaft I21 is at rest. The fingers on the sprocket chain are properly spaced to move a container into position beneath the sealing device proper during the motion of the chain. By means of the extension of the shaft 26a, the position of the fingers 28 may be adjusted, by moving the chain, so that larger or smaller containers will be brought into proper position.

When the container is in position the chain riops and the mutilated gear I 25 meshes with the "'ar I26 to drive the shaft [21 which in turn drives the sealing device. The measuring pump 50 is driven through the gears l3l, i 32 and 68 and as the shaft I21 begins to revolve the pump begins to operate, supplying fluid to the nozzle. lhe casing 51 of the pump 53 also begins to re volve, carrying with it the nozzle bracket and nozzle and the container clamping means as above described. As the nozzle revolves about the neck of the container, it deposits a ribbon of sealing fluid about the joint between the cap and the neck of the container. The clamping device operates as the casing of the pump revolves, holding the container in position during the sealing operation and releasing it as soon as the easing 5! has made one complete revolution and a ribbon of sealing fluid has been placed completely around the neck of the container. The various gears are so proportioned that a complete scaling operation takes place during the complete rotation of the shaft I i3.

As above pointed out the clutch cannot be re-- leased during that period. When the sealing operation is completed, however, the shaft I I3 and am I IE will have completed a revolution and the wheel H2 will ride into the dwell of the cam and thus allow the clutch to be released. Thus the machine cannot be stopped by the operator releasing the pedal H0 during the time when a container is being sealed.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to i ose skilled in the art without further description, and it will be understood that various changes in the size, shape, proportion and minor etails of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.-

What we claim, is:

1. In a container sealing device, a container support for locating a closed container with the joint between the container and closure in a predetermined position, mcans for supplying sealing fluid, and a discharge nozzle receiving sealing fluid from the said means located in a position to deliver said fluid against said joint, said nozzle being rotatable about the joint between the cap and neck of a container upon the container support.

2. In a container sealing device, a container support, a fluid supplying pump having a revoluble member, and a discharge nozzle mounted upon the revoluble member and adapted to fluid supplied by the pump about the joint be tween the cap and neck or" a container to be sealed.

3. In a containersealing device, a container support,a fluid supplying pump above and in axial line with the support and including a rotatable external bottom wall, an inwardly directed discharge nozzle for the pump positioned below and sup- -ported by the said bottom wall and revoluble therewith, and means for rotating the bottom wall of the pump.

4. In a container sealing device, a container support, a fluid pump above and in axial line with the support and including an inner pumping member above the central portion of the container support and an outer revoluble casing, driving means for the said pumping member, driving means for the said casing, and an inwardly directed discharge nozzle supported by the casing and revoluble therewith for discharging fluid supplied by the pump about the joint between the cap and neck of a container upon the container support.

5. In a container sealing device, a support for holding a container in upright position, a rotary fluid pump having an inner pumping member and an outer revoluble casing having their axes both above the center of the container placed on the support, separate driving means for the pumping member and the casing respectively, a nozzle bracket mounted upon and extending below the casing and revoluble therewith, and a nozzle having an inwardly directed discharge opening mounted upon the nozzle bracket to revolve therewith and discharge fluid delivered by the pump upon the side of the container and over the joint between the cap and neck of the container upon the container support.

6. In a container sealing device, a container support, relatively rotatable means for discharging sealing fluid under pressure about the cap and neck of a container upon the container support, and means operated by the relative rotation between the container support and fluid discharging means for clamping the container in position upon the container support.

7. In a container sealing device, a container support, a fluid pump having an external rotatable member, means carried by the said rotatable member for discharging fluid supplied by the pump about the joint between the cap and neck of a container upon the container support, and clamping means rotating with the rotatable member of the pump and operated by a stationary cam track surrounding the said member for clamping a container in position upon the container support.

8. In a container sealing device, a container support, a relatively rotatable discharge nozzle adapted to deliver a ribbon of sealing fluid about the joint between the cap and neck of a container positioned upon the container support, a reservoir for fluid sealing material, a feed pump for withdrawing sealing fluid from the reservoir,

and a measuring pump for receiving sealing fluid from the feed pump and delivering it in measured quantities to the discharge nozzle.

9. In a container sealing device, a container support, intermittently driven relatively rotatable means for discharging sealing fluid about the joint between the cap and neck of a container in sealing position upon the container support, a

, conveyor for intermittently advancing containers singly to sealing position, and means for operating the said conveyor only when the means for discharging sealing fluid and the container support are relatively stationary.

10. In a container sealing device. a table-like container support, a relatively rotatable intermittently driven nozzle for discharging fluid under pressure about the joint between the cap and neck of a container in sealing position upon the container support, an intermittently operated conveyor for advancing containers to sealing position upon the container support, and means for operating the conveyor only when the discharge nozzle is at rest.

11. In a container sealing device, a table-like container support, a sealing fluid pump, a discharge nozzle mountedabove the container support for intermittent rotation about a container in position upon the container support and adapted to discharge a ribbon of sealing fluid supplied by the pump about the joint between the cap and neck of such a container, means for intermittently'advancing containers to sealing position, and means for driving the sealing fluid pump and for rotating the nozzle only, when the container advancing means are at. rest.

12. In a containerv sealing. device, a container support, a sealing fluid pump, an intermittently rotatable supporting member, a nozzle mounted upon the supporting member and rotatable therewith for discharging sealing fluid supplied by the pump about the joint betweenthe cap and neck of a container upon the container support, a clamping device also mounted on the supporting member and operated during the rotation of said member to clamp a container in sealing position upon the container support, an intermittently operated conveyor for advancing containers to sealing position upon the container support, and means for operating the conveyor only when the rotatable supporting member is at rest.

13. In a container sealing device, intermittently operated container sealing mechanism for applying a ribbon of sealing fluid about the joint between the closure and neck of a container, a continuously operating motor, means releasably connecting the container sealing mechanism with the motor, and means for holding said means against release during the operation of the sealing mechanism.

14. In a container sealing device, a container support, a continuously operating motor, intermittently driven rotatable means for applying during its rotation a ribbon of sealing fluid about the joint between the cap and neck of a container, gearing for intermittently driving the said sealing fluid applying means, a clutch for connecting the intermittent gearing to the motor, operating means for the clutch, and means for holding the operating means to in turn hold the clutch during the rotation of the sealing fluid applying means.

15. In a container sealing device, an intermittently operated fluid pump, a rotary discharge nozzle for applying a ribbon of sealing fluid about the joint, and rotated during the operation of the said pump, gearing for intermittently rotating the pump, 'a continuously operating motor, a clutch adapted to connect the gearing and the motor, operating means for the clutch, and means including a cam driven by the motor for holding the operating means and thereby the clutch in engaged position until the operation of the fluid pump has ceased.

16. In a container sealing device, a container support, relatively rotatable means for discharging sealing fluid inwardly toward the side of a container placed upon the support and over the joint between the closure and neck of a container upon the container support, means for placing the sealing fluid under pressure, and means other than the pressure producing means for supplying a measured quantity of sealing fluid to the fluid discharging means.

17. In combination, a means for preforming and projecting a ribbon of viscous sealing material, means for supplying material to the said sealing ribbon forming and projecting means, means for supporting a closed container with the joint between the container and closure in the path of the sealing ribbon formed and projected by said means, and means for relatively rotatin'gthe container and sealing ribbon formthe nozzle and in the path of the ejected sealing ribbon, and means for causing a relative rotation between the nozzle and container to cause the preformed ribbon to be applied overv said joint.

19. In combination, a substantially horizontal nozzle for preforming a ribbon of viscous sealing material, means for delivering the sealing ma: terial under pressure to the nozzle to cause the preform-ation of the ribbon and its ejection from the nozzle, means for supporting a closed container in upright position with the exposed side joint between the container and its closure in line with the nozzle'and in the path of the ejected sealing ribbon, and means for causing a relative rotation on a substantially vertical axis between the nozzle and container to cause the preformed ribbon to be applied over said joint.

20. In combination with a support for a closed container having an annular joint between its closure and the container body, a sealing ribbon forming nozzle located substantially radial to the longitudinal axis of a container placed on the support and having its delivery end directed toward and in line with the joint, means for supplying a viscous sealing material under pressure to the nozzle to cause it to be preformed by said nozzle and projected against the said joint, and means for causing a relative rotation between the container and nozzle to cause the ribbon as preformed and projected to be applied around the container and over the joint.

21. In combination with a support for a closed container having an annular joint between its closure and the container body, a sealing ribbon forming nozzle having its delivery end directed toward and in line With the joint, means for repeatedly causing periodic relative rotation between a container on the support and the nozzle to cause the ribbon as preformed and projected to be applied around the container and over the joint, means for intermittently supplying sealing material under pressure to the nozzle during said periods of relative rotation, and intermittently operating means active between said periods to automatically remove the sealed containers and position unsealed containers to be sealed.

22. In sealing apparatus, a support for the container to be sealed, a means for applying sealing material over the joint between the closure and container, means for relatively moving the container and applying means, a supply means communicating with the applying means, mechanism for putting the supply through said means under pressure, and means automatically operating upon the relative movement between the container and applying means for governing the amount of sealing material supplied to the applying means.

23. In sealing apparatus, a support for the container to be sealed, a nozzle for delivering a pre formed band of sealing material over the joint between the container and its closure, means for cause the ribbon to be applied over the joint, a reservoir for sealing material, a conduit connecting the reservoir and the nozzle, means in the conduit for causing the sealing material to be delivered under pressure to the nozzle, and means between said pressure creating means and the nozzle for governing the amount of sealing material supplied under pressure to the nozzle.

24. In sealing apparatus, a support for the container to be sealed, a nozzle for delivering a preformed band of sealing material over the joint between the container and its closure, intermittently operating means for relatively rotating the container and nozzle to cause the ribbon to be applied over the joint, a reservoir for sealing material, a conduit connecting the reservoir and the nozzle, 2, pump in the conduit for causing the relatively rotating the container and nozzle to sealing material to be delivered under pressure to the nozzle, and means intermittently operable with the rotating means for governing the amount of sealing material supplied under pressure to the nozzle.

25. In a container sealing device, a container support for holding a container in upright position, means rotatable about a container upon the container support for discharging sealing fluid inwardly under pressure about the joint between the closure and neck of the container, and means for clamping the container in position upon'the container support and leaving unobstructed the joint between the closure and the neck of the container.

IRVING E. BLACK. HENRY B. SILVER. FREDERICK J. HOFFER. 

